Electropneumatic organ-valve.



G. H. CHAPMAN. ELECTROPNEUMATIC ORGAN VALVE.

APPLICATION FiLED JUNEZB, I918.

Patented May 6, 1919.

GEORGE E. CHAPMAN, OF CHICAGO, ILLIINQIS.

nmcrnornnunsrrc ORGAN-VALVE.

Specification of Letters Patent.

Patented May 6, E919.

Application riled June 28, 1818. Serial No. 242,840.

To all whom it hwy-concern: Be it known that I, Gnonon CHAPMAN, citizenof the United States, residing at Chicago, in the county of Cook andState of Illinois, have invented certain new and useful Improvements inElectropneumatic Orgamvalves, of which the following is a specification.

This invention relates to electropneumatic valves used in theconstruction of. pipe organs and has reference more particularly toimprovements in what are known as the magnet valves that are employed tosupply andexhaust the channels of air passages controlling the primarypneumatics and valves.

One object of the present invention is to simplify and cheapen thestructure of de- Vices of this kind, which object is attained chiefly bythe provisioh of a valve casing, the main body of which is formed as aonepiece blockthat is attachable to the under or upper side of'the windor action box and contains the valve chamber, valve or armsture, andlateral air supply and exhaust passage, which block has heretofore beenmade in two or three mating sections secured together with interposedpacking to pre vent leakage.

Another object is to simplify and improve the construction in respect tothe disposition of the magnet leads, so as to both eliminate thenecessity of carrying the magnet wires through the walls of the wind oraction box, as has heretofore usually been the practice, and also locatethe terminal pin to which one end of the magnet winding is connectedwholly outside the walls of the wind or action box, for which purposesthe terminal pin is mounted in the valve block with its magnet wireengaging end lying in a recess or pocket in the action box en ging faceof the block, which affords 1'00 for soldering one lead wire of themagnet coil to the pin so that the solder will not project beyond thesaid face of the block and interfere with the air-tight joint betweenthe block and the action box.

Another object of the invention'is to provide an improved spacer betweenthe core of the magnet and the valve disk or armature.

A still further object is to provide a valve casing structure presentinga desirable combination of'lightness and strength to support the magnetrigidly and capable of being readily molded or cast to the desiredshape, for which purpose I make the main body of the block of one pieceof balielite or other material having similar properties, and I combinetherewith a metal insert block, preferably of brass, and formed withknurled ed es to hold it rigidly in the bakelite in whidh metal insertis secured the core of the magnet and through which is formed the inletduct to the valve chamber. In order that my present invention may bereadily understood by those skilled in the art, I have illustrated inthe accompanying drawing a practical and preferred embodiment thereof,in which drawing- Figure 1 1s a cross-section view through a.

wind or action box and magnet-operated valve, showing the magnet andvalve proper in elevation;

Fig. 2 is a section on line 2-2 of Fig. 1;

Fig. 3 is a perspective detail of the metal insert block; and

Fig. 4 is a bottom plan view of the valve cas' ing block with the plugand valve proper omitted.

Referring to the drawing, 1 designates the wind or action box of usualconstruction, the bottom wall of which is rovided with ducts or passages2 and 3, the ihrmer communicating at its upper end with the interior ofthe action box and accommodating an electromagnet 4:, while the latteris channeled through the bottom of the action box so that it can supplyand exhaust the air to and from a primary pneumatic. Mounted in andextending lengthwise of the action box is a metal conducting rod or wire6 to which one lead 7 of the winding of each of the several magnets issoldered. The parts thus far described are or may be all as usual inconstructions of this kind.

Attached to the underside of the bottom wall of the action box by a pairof screws 8 and a gasket 9 is the valve housing 'or casing, the mainbody 10 of which consists of a onepiece rectangular molded block, whichis preferably made of bakelite,-a material excellently adapted to thepurposes of an air valve housing or casing, in lieu of metal, on accountof its lightness, its resistance to chemical changes, as compared withmetal.

. valve chamber 11. a plug preferably of the same material as the 11, alateral air duct 12 communicating with the chamber 11 and openingthrough the upper face of the block in register with thesupply andexhaust duct '3, a recess or pocket 13 in its upper face and on theopposite side of the valve chamber from the air duct 12, and a threadedopeningl through its lower face below the valve chamber.

In the upper face of the block 10 directly over the valve chamber 11 isa metal insert 15, preferably of brass. The edges of this insert areknurled, or otherwise roughened, as shown at 15' in Fig. 3, and the sameis very strongly and rigidly secured in place by introducing it in themold and casting the block 10 therearound. Through this metal insertblock are formed a pair of holes 16 in which are set the pole-pieces 4that form the core of the magnet 4:. Between the holes.

16 are formed a second pair of holes 17 that form an inlet duct from thepassage 2 to the 18'designates a threaded block 10 that normally fillsthe threaded opening 14 in the bottom of the block and is made with aconical upper end 19 forming a valvet-seat and with an axial outlet orvent duct 2-0. Within the valve chamber nially rests on the valve seat19 and closes the outlet duct 20, but, when attracted by the magnet,opens the outlet duct 20 and closes the inlet ducts 17.

till In the end of the block 10 opposite the air duct 12 is mounted aterminal pin 22, said pin being preferably introduced in the same manneras the insert 15 by casting the block the-rearound in the mold. Theupper end of this pin lies in the recess 13, and to it is soldered theother end 23 of the magnet winding; the recess serving to contain thesolder below the upper face of the block 10 so that it does not impairthe air-tight joint between the latter and the action box. l

To the under side of the insert 15, which forms the top wall of thevalve chamber 11, is cemented an annular washer 24: of

I paper or other thin material that serves as a,

spacer in the magnetic circuit and prevents direct contact of the valveor armature with the core -te--av0id sticking due to residualnmgnetisnr,,,,.The valve disk is of smiiciently greater diameter thanthe internal diameter of the washer 24 to insure the closing of theinlet duct 17 when the valve is raised by the magnet.

lt is believed that the foregoing description. in connection with thedrawing, will make clear to those Familiar with this art the sh-ncluralnoyclties, mode of action, and advantages of this invention and themanner in which ihc slated objects are attained. Manifestl minor changesin structural details and relative arrangement of parts from thosehere'shown may he made without departing 11 is :1 metal disk valve orarmature 2]. that nor- 'innor side of from the substance of theinveutionyor sacrificing any of the advantages secured thereby.

- Hence, I reserve such detail modifications and changes as fall withinthe spirit and purview of the appended claims.

I claim:

1. An electn:pneumatic organ valve, (:O111- prising a 0110- piecevalve-casing block adapt ed to be attached to the outer surface of awall of the action box and having a transverse bore forn'iing the sidewalls of a valve chamber and a lateral air duct leading from said valvechamber to the face of the block )risino' a oneiece valve-casin ada tedto l h g V we attached to the outer surface ofa wall of the action boxand having a transverse bore I forming the side Walls of a valvechamber,

a lateral air duct leading from said valve chamber to the face of theblock which lies against said. action box, and a threaded opening in itsopposite face communicating with said valve chamber, a metal insertmounted in the action box engaging face'of said block and forming onewall of said valve chamber, said insert formed with an inlet duct tosaid valve chamber, an electro-magnet having its core mounted in saidmetal insert, a threaded plug mounted 'in'said threaded opening andhaving a conical inner end forming a valveseat and an axial outlet duct,and a disk valve in said valve chamber operated by said magnet tocontrol said inlet and outlet ducts.

3. In an eleotropneumatic organ valve, the combination of a valve-casingadapted to be attached to a wall of the wind chest and containing avalve chamber, an electro-magnot having its core set in a wall of saidvase chamber, a disk valve in said valve chamber, and a thin annularwasher cemented to the said valve chamber wall and servingas a spacer toprevent direct contact of said valve magnetized.

4. ln an elcctropneumatic organ valve, the combination of a valve-casingblock adapted to be attached to the outer side of a wall of the actionbox and fern god with a recess in its action box engaging side, aterminal pin mounted he said block with one endthereof lying in saidrecess, and an electro-magnet mounted in said block and having one endof its winding soldered to the end of said pin in said recess. I

with said pore when the core is 5. In an electropneumatic organ valve,the combination of e molded valve-casing block adapted to be attached tothe outer side of a wall of the action box and formed with asubstantially central valve chamber, an 'air duct at one side of saidvalve chamber, and a recess in its action ho'x enga 'ng face 10- cai-edon the opposite side 0% said valve chamber from said air duct, aterminal pin cast in said block with one end lying in said recess; andan electro-niagnet'mounted in said block and having one end of itswindin'g soldezqed to the end of said pin in said 6. As a new article ofmanufacture, a 15 valve casing for electropneumatic organ valvesdesigned to be attached to the wall of the action box comprising a onepiece block having atransverse bore forming the side walls of a valvechamber, an oblique passage leading from said chamber through the sideof said casing adapted to lie in contact with said wall of the actionbox, and a plugged opening leading from said chamber through the side ofsaid casing adapted to lie remote 25 from the action box.

GEORGE H. CHAPMAN.

